package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;

import com.atguigu.springcloud.lb.LoadBalanced;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {

    public  static  final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";
    @Resource
    private RestTemplate restTemplate;
    @Resource
    private LoadBalanced loadBalanced;
    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult create(Payment payment)
    {
        return  restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment, CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment>  getPayment(@PathVariable("id") Long id)
    {
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }
    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult getPayment2(@PathVariable("id") Long id){
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
        if(entity.getStatusCode().is2xxSuccessful())
        {
            return entity.getBody();
        }
        else
        {
            return new CommonResult(444,"操作失败", null);
        }
    }
    @GetMapping(value = "/consumer/payment/lb")
    public ResponseEntity<String> getPaymentLB()
    {
        List<ServiceInstance> instances  = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");

        if (instances == null || instances.size() <= 0){
            return null;
        }

        ServiceInstance serviceInstance = loadBalanced.instance(instances);
        URI uri = serviceInstance.getUri();
        return  restTemplate.getForEntity(uri+"/payment/lb",String.class);
    }
}
